142121356 has 12 divisors (see below), whose sum is σ = 267844192. Its totient is φ = 65594448.

The previous prime is 142121333. The next prime is 142121363. The reversal of 142121356 is 653121241.

It is a happy number.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 142121356.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1366500 + ... + 1366603.

Almost surely, 2^142121356 is an apocalyptic number.

It is an amenable number.

142121356 is a deficient number, since it is larger than the sum of its proper divisors (125722836).

142121356 is a wasteful number, since it uses less digits than its factorization.

142121356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2733120 (or 2733118 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 142121356 is about 11921.4661849959. The cubic root of 142121356 is about 521.8589236254.

Adding to 142121356 its reverse (653121241), we get a palindrome (795242597).

The spelling of 142121356 in words is "one hundred forty-two million, one hundred twenty-one thousand, three hundred fifty-six".